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Editor to share with you what feof means in PHP. I hope you will get something after reading this article. Let's discuss it together.

Feof in PHP is a function that detects whether the end of the file has been reached. Its syntax is "feof (file)", where the parameter file specifies the open file to check.

This article operating environment: Windows7 system, PHP7.1, Dell G3 computer.

The feof () function detects whether the end of the file (eof) has been reached.

If the file pointer reaches EOF or returns TRUE if there is an error, otherwise an error (including socket timeout) will be returned, otherwise FALSE will be returned.

Grammar

Feof (file)

Parameters.

File is required. An open file that is specified to be checked.

Description

The file parameter is a file pointer. The file pointer must be valid and must point to a file that was successfully opened by fopen () or fsockopen () (but has not been closed by fclose ()).

Tips and comments

Tip: the feof () function is useful for traversing data of unknown length.

Note: if the server does not close the connection opened by fsockopen (), feof () waits until it times out and returns TRUE. The default timeout limit is 60 seconds, which can be changed using stream_set_timeout ().

Note: if you pass an invalid file pointer, you may fall into an infinite loop because EOF does not return TRUE.

Examples

Output:

Hello, this is a test file. There are three lines here. This is the last line. After reading this article, I believe you have a certain understanding of "what does feof mean in PHP". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for your reading!

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